Add pipeline tag, link to paper

This PR adds the pipeline tag `feature-extraction` so that the model can be found by the relevant filter on https://huggingface.co/models. It also
adds a link to the paper.

README.md

@@ -4,11 +4,12 @@ license: apache-2.0
 tags:
 - robotics
 - tokenizer
+pipeline_tag: feature-extraction
 ---
 
 # FAST: Efficient Action Tokenization for Vision-Language-Action Models
 
-This is the official repo for the [FAST action tokenizer](https://www.pi.website/research/fast).
+This is the official repo for the [FAST action tokenizer](https://www.pi.website/research/fast) from the paper [FAST: Efficient Action Tokenization for Vision-Language-Action Models](https://huggingface.co/papers/2501.09747).
 
 The action tokenizer maps any sequence of robot actions into a sequence of dense, discrete **action tokens** for training autoregressive VLA models.